Abyss School: 06/28 (Fri) update - Added Seyoung costume and fixed bugs

○ Seyoung costume added - Added “Sportwear” - Added "Casual" ※ The unlock conditions are the same as Yoohee’s Sportwear / Casual costume. ○ Improvement - Seyoung's 3rd attack power is doubled. ○ Bug fixes - Fixed an iss…